As the definition above, Stoichiometry deals with quantitative analysis of chemical reactions, it is also the relationship between reactants used and products produced. It can use as molecules AND moles; it can also be used as conversion factors. The coefficient in balanced equations tell us the number of moles reacted or produced.
Stoichiometry calculations can predict how elements and components diluted in a standard solution react in experimental conditions. Stoichiometry is founded on the law of conservation of mass: the mass of the reactants equals the mass of the products.
A stoichiometric amount or stoichiometric ratio of a reagent is the amount or ratio where, assuming that the reaction proceeds to completion:
- all reagent is consumed,
- there is no shortfall of reagent, and
- no residues remain.
Here is a little video that i found on youtube that could help you understand more about Stoichiometry - http://www.youtube.com/watch?v=rESzyhPOJ7I
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